21100220311310 has 32 divisors (see below), whose sum is σ = 44579307165120. Its totient is φ = 7038837971712.

The previous prime is 21100220311283. The next prime is 21100220311351. The reversal of 21100220311310 is 1311302200112.

It is a super-2 number, since 2×21100220311310² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4073399015 + ... + 4073404194.

It is an arithmetic number, because the mean of its divisors is an integer number (1393103348910).

Almost surely, 2^{21100220311310} is an apocalyptic number.

21100220311310 is an abundant number, since it is smaller than the sum of its proper divisors (23479086853810).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21100220311310 is a wasteful number, since it uses less digits than its factorization.

21100220311310 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8146803260.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 21100220311310 its reverse (1311302200112), we get a palindrome (22411522511422).

The spelling of 21100220311310 in words is "twenty-one trillion, one hundred billion, two hundred twenty million, three hundred eleven thousand, three hundred ten".